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<?php
/**
* Abstract class for formatters that process multiple events.
*
* The formatter does not maintain any state except for the
* arguments passed in the constructor (user and language)
*/
abstract class EchoEventDigestFormatter {
public function __construct( User $user, Language $language ) {
$this->user = $user;
$this->language = $language;
}
/**
* Equivalent to IContextSource::msg for the current
* language
*
* @return Message
*/
protected function msg( /* ,,, */ ) {
/**
* @var Message $msg
*/
$msg = wfMessage( ...func_get_args() );
$msg->inLanguage( $this->language );
return $msg;
}
/**
* @param EchoEvent[] $events
* @param string $distributionType 'web' or 'email'
* @return string[]|false Output format depends on implementation, false if it cannot be formatted
*/
final public function format( array $events, $distributionType ) {
$models = [];
foreach ( $events as $event ) {
$model = EchoEventPresentationModel::factory( $event, $this->language, $this->user, $distributionType );
if ( $model->canRender() ) {
$models[] = $model;
}
}
return $models ? $this->formatModels( $models ) : false;
}
/**
* @param EchoEventPresentationModel[] $models
* @return string[]|string
*/
abstract protected function formatModels( array $models );
}
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